Four-wave mixing spectroscopy of highly excited states of small molecules

Koichi Tsukiyama, Motowo Tsukakoshi, Takahiro Kasuya

Research output: Contribution to conferencePaperpeer-review


Four-wave sum frequency mixing experiments in NO and CO are described. The NO experimental apparatus has been described previously (K. Tsukiyama et al., 1988). Typical spectral profiles are presented, showing that the intensity of VUV radiation peaked at slightly (approximately 0.1 cm-1) higher frequencies than resonance transitions. No corresponding P(N′) line could be detected. The latter observation is inconsistent with REMPI and OODR data where both P(N′) and R(N′) lines appear with almost equal intensity. These anomalous ΔJ constraints are found to be closely connected with the four-wave mixing process responsible for the VUV generation. The CO experimental setup is shown schematically. A typical spectrum is shown. The analysis of the rotational profiles revealed that the XUV intensity was enhanced at the high energy side of rotational levels of the probed Rydberg states and that the observed rotational structure is in accordance with the selection rules holding for an ordinary single photon transition.

Original languageEnglish
Number of pages2
Publication statusPublished - 1 Dec 1990
Event17th International Conference on Quantum Electronics - IQEC '90 - Anaheim, CA, USA
Duration: 21 May 199025 May 1990


Conference17th International Conference on Quantum Electronics - IQEC '90
CityAnaheim, CA, USA


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